Article
Optics
Qian Zhou, Zhiyong Zou
Summary: This article introduces a modified optical design for a broadband astigmatism-corrected Czerny-Turner spectrometer, and demonstrates its superior performance compared to traditional spectrometers through detailed comparisons.
Article
Optics
Wenjie Shi, Lin Gao, Long Zhang, Zhiwei Feng, Fan Fang, Guo Xia
Summary: This study proposes a method for evaluating the spectral resolution of crossed-asymmetric Czerny-Turner spectrometers by comparing the impact of different slit functions and widths on the optical transfer function. Through simulation and experiments, it is found that different slit functions are suitable for different slit widths. This method can provide guidance in the preliminary optical design process of spectrometers.
Article
Optics
Su Wu, Tao Wang, Chan Huang, Jiapeng Gu, Lei Yu, Hui Xue, Yuan Shen
Summary: An advanced optical design for a Czerny-Turner spectrometer with low f-number, high resolution, astigmatism-free, and broadband characteristics is proposed in this paper. The addition of a hemispherical lens between the entrance slit and collimating mirror can correct astigmatism and increase numerical aperture simultaneously. The paper analyzes the theory and method for aberration correction in detail and presents an optimized design example. A comprehensive comparison between the improved Czerny-Turner spectrometer and the conventional one is also provided.
Proceedings Paper
Optics
Chengliang Xia, Chunmei Zeng, Zhiqiang Feng
Summary: The study designed a miniaturized spectrometer using a cross-type Czerny-Turner structure, corrected aberrations with a cylindrical mirror, optimized the design through Zemax software, and achieved improved wavelength resolution.
AOPC 2021: OPTICAL SPECTROSCOPY AND IMAGING
(2021)
Article
Chemistry, Analytical
Zhiwei Feng, Guo Xia, Rongsheng Lu, Xiaobo Cai, Hao Cui, Mingyong Hu
Summary: This paper presents a unique method to design a high-throughput and high-resolution ultrathin Czerny-Turner (UTCT) spectrometer based on Coddington's equations. By simulating the design, a spectral resolution of 0.4 nm at central wavelength and 0.75 nm at edge wavelength was achieved with a slit width of 25 μm and a groove density of 900 lines/mm.
Article
Engineering, Electrical & Electronic
Wu Yunpeng, Wang Jun
Summary: In this study, we propose an anti-secondary diffraction condition for the aberration correction of an M-type Czerny-Turner spectrometer and establish an M-type coma-free Czerny-Turner spectrometer. The correctness of the theoretical analysis is verified through simulation experiments, showing that the optimized optical system has a spectral resolution better than 1 nm in the range of 200-500 nm under specific conditions.
LASER & OPTOELECTRONICS PROGRESS
(2022)
Article
Instruments & Instrumentation
Dongyue Liu, Bryan M. Hennelly
Summary: This paper introduces a new wavelength calibration routine that can quickly and accurately calibrate spectrometers. For spectral bands outside the range of the reference lamp's spectral lines, the method provides higher accuracy compared to third and second order fitting.
APPLIED SPECTROSCOPY
(2022)
Article
Engineering, Electrical & Electronic
Shimwe Dominique Niyonambaza, Gabriel P. Lachance, Elodie Boisselier, Mounir Boukadoum, Amine Miled
Summary: This work presents a portable optofluidic system for biodetection using ultrastable gold nanoparticles functionalized with a dopamine-binding aptamer. The system integrates an automatic sampling and mixing fluidic system with a spectrometer to measure the plasmon band position of the gold nanoparticles. The system can detect bathochromic shift with an optical resolution of 1 nm using a 50-mu m input slit. Compared to other molecule detection techniques, this optofluidic system offers portability and automatic detection for in situ applications.
IEEE SENSORS JOURNAL
(2023)
Article
Spectroscopy
Xian-guang Fan, Yingjie Zeng, Yu-Liang Zhi, Ting Nie, Ying-jie Xu, Xin Wang
Summary: The study proposes a compact, signal-to-noise ratio enhancement of the Raman spectrometer by optimizing optical structure and noise reduction method. Results show that the performance of the compact Raman spectrometer can be increased to a certain extent with improvement in hardware and algorithm, along with utilizing CDAE to remove noisy signals and achieve higher SNR.
JOURNAL OF RAMAN SPECTROSCOPY
(2021)
Article
Optics
Nazanin Hoghooghi, Sida Xing, Peter Chang, Daniel Lesko, Alexander Lind, Greg Rieker, Scott Diddams
Summary: Mid-infrared (MIR) spectrometers are essential for studying molecular fingerprinting and hyper-spectral imaging. However, current GHz MIR dual-comb absorption spectrometers lack the ability to combine high speed, high spectral resolution, and broad optical bandwidth. This study introduces a broadband MIR frequency comb laser platform that overcomes these limitations, enabling accurate characterization of complex, transient events in chemistry, combustion, and microscopy.
LIGHT-SCIENCE & APPLICATIONS
(2022)
Article
Optics
Jianwei Zhou, Hongxing Cai, Yu Ren, Shuang Li, Chunxu Jiang, Zhong Lv, Guannan Qu, Yong Tan, Jing Shi, Tingting Wang, Quansheng Liu
Summary: This paper proposes a broadband NIR detector imaging scheme based on nonlinear crystal frequency conversion, which utilizes silicon-based detectors for direct detection, overcoming the limitations of existing NIR detectors in terms of high cost and noise. The effectiveness of the scheme is validated through theoretical investigation and experimental measurement.
Article
Optics
Guo Pan, Deng Yanbao, Wang Lifu, Chen Siying, Tan Wangshu, Zhang Yinchao, Sun Yuting, Zhang Jiayi, Yang Wenhui, Chen He
Summary: The Czerny Turner spectrometer is widely used for Raman, fluorescence, and atmospheric remote sensing due to its simple structure and high resolution. A modified optical design with a common linear-array detector for dual-band spectral detection has been proposed and simulated using Zemax.
ACTA PHOTONICA SINICA
(2022)
Article
Optics
M. Capezzuto, D. D'Ambrosio, S. Avino, A. Giorgini, G. Gagliardi, P. Malara
Summary: In this study, a fast-scan optofluidic Fourier transform (FT) spectrometer on the tip of an optical fiber is demonstrated by stabilizing the evaporation dynamics of a microliter fluorocarbon droplet. Compared with other FT near-infrared (NIR) small-scale spectrometers reported in the literature, the fluorocarbon droplet spectrometer shows the largest wavelength span and span/resolution ratio, enabling easy spectral analysis of broadband or narrowband radiation. This opens up practical applications for droplet spectrometers as advanced optofluidic NIR analyzers with small size and low cost, capable of operating in harsh environments.
Article
Optics
Qihang Chu, Yuqi Sun, Ci Sun, Yu Shuo, Fuguan Jirigalantu, Xiaotian Li, Fuguan Li, Bayanheshig
Summary: This paper proposes a spatial heterodyne Raman spectrometer (SHRS) based on a multi-Littrow-angle multi-grating (MLAMG). Compared with a conventional multi-grating, the MLAMG provides higher spectral resolution and a broader spectral range, and is easier to produce. The experiments demonstrate the significance of MLAMG-SHRS for broadband measurements in various potential applications.
Article
Optics
Simon Nellen, Sebastian Lauck, Garrit Schwanke, Milan Deumer, Robert B. Kohlhaas, Lars Liebermeister, Martin Schell, Bjoern Globisch
Summary: In future wireless communication networks at terahertz frequencies, the directivity and beam profile of emitters are crucial, as no additional beam forming optics can be used in free-space. Experimental and numerical investigations showed that the feeding point structure connecting the photodiode and antenna significantly influences the radiation pattern. By optimizing the feeding point, side lobes were reduced from -2 dB to -13 dB and the beam angle was narrowed at 300 GHz.
